I doubt you need an external buffer, and the PX-8+ has one built in anyway at its output. Also, you'd generally try to keep from putting a buffer in front of anything like a Fuzz Face and both your wahs are true-bypass so pick one (or rock both I suppose) and rock out!
If I had this pile of stuff and a limited amount of time to just get something together I would do the following...
- Guitar -> Wah -> PX-8+ Input
- Loop 1 = Fuzz Face and the COT 50*
- Loop 2 = Ultimate Octave
- Loop 3 = "klone"
- Loop 4 = whichever vibe you choose
- Loop 5 = Choralflange
- Loop 6 = Tremodillo
- Insert Send -> (Beano Boost) -> (Volume Pedal) -> Amp Instrument Input
- Amp FX Send -> (Volume Pedal) -> PX-8+ Insert Return
- Loop 7 = Replica
- Loop 8 = Hall of Fame (these could go either way really, don't be afraid to experiment)
- PX-8+ Output to Amp FX Return
*The Fuzz Face and COT 50 can be activated or bypassed directly to select which one you'll hear when Loop 1 is Active)
(The Beano Boost and Volume Pedal are shown with optional positions)
This should be a pretty rocking setup that would likely even make Joey's now famous "Forbidden Lick" sound good
Let us know how it goes!
...and Happy Birthday to ya!